Method of producing radiator-nipples.



J. A. FIELD. METHOD OF PRODUCING RADIATOR NIPPLES.

APPLICATION FILED NOV. 7, 1907.

Patented Mar. 30, 1909.

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J. A. FIELD. METHOD OF PRODUCING RADIATOR NIPPLES.

APPLICATION rmm NOV. 7, 1907.

Patented Mar. 30, 1909.. I7 I a s nn -snnm 2.

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J. A. FIELD. METHOD OF PRODUCING RADIATOR NIPPLES.-

APPLICATION FILED NOV. 1, 1907.

Patented Mar. 30, 1909.

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- 5 u fihi-b Q. y a 7 MW JESSE A. FIELD, OF DUNKIRK, NEW YORK.

METHOD OF PRODUCING RADIATOR-NIPPLES.

. Specification of Letters Patent.

Patented. March 30, 1909.

Application filed November 7, 1907. Serial No. 401,108.

T 0 all whom it may concern:

Be it known that I, J ESSE A. FEELI), a citizen of the United States, residing at Dunkirk, in the county of Chautauqua and State of New York, have invented a certain new and useful Improved Method of Producing Radiator-Nipples, of which the following is a specification.

This invention relates to an improved method of producin nipples or couplings for radiator sections or oops or the like, and the object of the invention is to produce a comparatively cheap composite nipple in such a manner that the parts or annuh thereof are joined rigidly together, all of which will be fully and clearly hereinafter described and claimed reference being hadito the accompanying drawings, in which a preferred adaptation of an apparatus capable of carrying out the improved orocess is shown.

Figure 1 is a. side elevation of a mold in which the inner annulus is supported while the metal which is to form the outer annulus is poured in molten condition into the mold around the inner annulus. Fig. 2 is a top plan view of the mold. Fig. 3 is a central vertical section through the mold on line aa, Fig. 2 showing an inner annulus in place therein, the mold being prepared for the introduction of the molten metal which is to form the outer annulus. elevation of the mold. Fig. 5 is a vertical transverse section through the mold on line b b, Fig. 1 showing a completed nipple therein. Fig. 6 is a horizontal section throu h the mold on line 0 c, Fig. 1 showing the mo d open and an inner annulus supported in one of the members thereof. Fig. 7 is a horizontal section through the mold on line c c,

Fig. 1 showing an inner annulus in place therein, the mold being prepared for the introduction of the molten metal which is to form the outer annulus. Fig. 8 is a side elevation of the inner annulus before it is placed in the mold. Fig. 9 is an end view of the same. Fig. 10 is a transverse section through the same. Fig. 11 is,a side elevation of the completed nilpple. Fig. 12 is an end view of the same. 1g. 13 is a transverse section through the same.

This improved process is for the purpose of producing a composite nipple as described in my companion application Serial Number 401,109, filed November 7, 1907.

In carrying out the process the inner an- Fig. 4 is a front,

l l l r I As lead, the metal of which the outer annuhis is preferably composed has a lower melting point than the metal of which the inner annulus 1s composed, such as cast iron, the

metals of the two annuli are heated toabout.

the same temperature with the iron about red hot and the lead in a molten condition suitable for casting. Thus when the lead is poured into the mold, it gradually liardens and shrinks upon the iron so that it becomes inseparably attached thereto. is the surface of the iron is comparatively rough, the surface of the lead in hardening and shrink-- ing becomes con-es ondingly rough and in fact locks itself firm y and rigidly around the iron. I

The preferred form of mold in which the inner annulus 1 is supported while the outer annulus is cast thereon, is constructed as shown in Figs. 1 to 7, inclusive of the draw-.

in s, to which reference will be had in the in owing description. K

The mold is composed of two members 2 and 3 which are hinged together so as to be capable of being separated and swung apart in a horizontal direction.

The members 2 and 3 have rearwvardb ex tending arms 4- and 5, the rear extremities 6 and 7 of which curve to meet each other at a central point. .The rear extremities of the arms are formed to constitute a hinge, the extremity? of the arm 5 being forked so as to embrace the extremity 6 of the arm 4. The hinge members 6 and 7 are pivoted together by a pivot bolt 8, which is supported in the yoked upper portion of a vertical standard 9. This standard 9 is formed integrally with a base 10 upon which the entire mold is mounted. The base may be fastened l l l l upon a suitable table or bench by screws 11, see Figs. 6 and 7.

Each of the members 2 and 3 of the mold is provided on its inner face with an annularrecess 12 the diameter of which is equal to the outside diameter of the outer annulus of thonipple, and the depth of which is equal to just one-half the width of the nipple. The

nulus 1, ,is centrally supported in a mold i annular wall of each depression 12 1S slightly coned, that is, it slopes inwardly from its outer edge to its inner wall. These annular coned Walls of the depressions 12 of the mold members 2 and 3 give the oppositely tapered or coned peripheral surface to the outer annulus when it is cast upon the inner annulus.

An annular flange 13 is formed upon the inner wall. of each of the depressions 12 and has a tapered or coned outer surface which tapers in a direction oppositely to the ta er of the annular wall of the depression. l his flange forms a support for the inner annulus 1, and also centers it accuratelyrin the depression 12. ihe width of this flange 13 is slightly less than the depth of the depression, as will be seen by referring to Figs. 5, 6 and 7. The outside diameter of the flange 13 is greatest at its inner extremity and this diameter is equal to the inside diameter of the annulus 1, so that when the annulus 1 is placed upon the flange 13 and pushed into the depression 12, it will be accurately centered therein. I

The members 2 and 3 are rovided with horizontal projections 14 which extend from the front sides thereof and are adapted to rest upon a support 15 when the mold is closed. This su port is preferably cast integral with the has'e 10 as shown in Fig. 3. The support 15 has a slight projection on its .upper surface which serves as a stop against which the projection 14 on the member 2 strikes so as to accurately center the members when the mold is closed. The members of the mold are locked together when closed by a clamp 16 which fits over the projections 14.

An opening 17 is located in the top of each of the "members 2 and 3 and communicates with the depression 12. The metal which is to form the outer annulus of the nipple is poured in a molten condition through these openings and fills the space between the inner annulus 1 and the annular coned walls of the depressions 12. Air outlets 18 are formed in the members 2 and 3 adjacent to the pouring openings 17 and permit the escape of the air from within the mold as the molten metal is poured. in.

In making radiator nipples by my im proved process or method, I use an inner annulus 1 of hard metal such as cast iron and shaped as shown in Figs. 8, 9, and 10, and after heating it to a good red heat, place it upon the flange 13 o the member 2 of the mold, as shown in Fig. 6, and swing said member upon its hinge until it is stop ed by the projection on the support 15 as eretofore described. The other member 3 of the erases mold is then'swung toward the member 2 and when closed the two members are locked together by-the clamp 16. As the members of the mold close upon each other, the annulus 1, is accurately centered by the'flanges 13, see Fig. 7.

The metal which is to form the outer or surrounding annulus is preferably lead, to which a slight percentage of zinc may be added to give a greater degree of hardness thereto when C001. This metal is heated until it is in a molten state and is then poured into the mold through the inlet openings 17, in the top of the mold to form the outer annulus 19. As the molten metal enters, the air escapesthrough the outlets 18. The metal is permitted to 'cool sufficiently so as to set before the com leted nipple is removed from the mold. W 1en sufficiently cool so that all danger of distortion of the outer annulus 19 is past, the clamp 16 is removed from the projections 14 and a suitable instrument is introduced between the projections 14, and the members 2 and 3 of the mold forced apart. As the mold opens, the lead which fills the openings 17 and 18 is cut or sheared oil so that the nipple is removed from the mold in its completed state.

One of the great advantages of making radiator nipples by this method is that the two concentric amiuli are united inseparably, the metal of the outer annulus 19 being immovably locked to the roughened surface of the cast iron inner annulus 1.

I claim as my invention 1 A process for producing radiator nipples composed of hard and soft tubular portions of metal which consists in heating a hard portion, placing said hard portion in a suitable mold, and casting the soft metal in tubular form around said-hard portion.

2. A process for producing radiator nipplescomposed of hard and soft portions of metal which consists in heating a hard portion to substantially the temperature of the melting point of the soft metal, placing said hard portion in a suitable mold, and casting the.

JESSE A. FIELD.

Witnesses J. W. AULAR, JoHN J. MADIGAN. 

